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81 | |
81 | |
82 | our $idle; # idle handler |
82 | our $idle; # idle handler |
83 | our $main; # main coro |
83 | our $main; # main coro |
84 | our $current; # current coro |
84 | our $current; # current coro |
85 | |
85 | |
86 | our $VERSION = 5.17; |
86 | our $VERSION = 5.21; |
87 | |
87 | |
88 | our @EXPORT = qw(async async_pool cede schedule terminate current unblock_sub); |
88 | our @EXPORT = qw(async async_pool cede schedule terminate current unblock_sub rouse_cb rouse_wait); |
89 | our %EXPORT_TAGS = ( |
89 | our %EXPORT_TAGS = ( |
90 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
90 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
91 | ); |
91 | ); |
92 | our @EXPORT_OK = (@{$EXPORT_TAGS{prio}}, qw(nready)); |
92 | our @EXPORT_OK = (@{$EXPORT_TAGS{prio}}, qw(nready)); |
93 | |
93 | |
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665 | venerable L<Event|Event> module) are not thread-safe (a weaker form |
665 | venerable L<Event|Event> module) are not thread-safe (a weaker form |
666 | of reentrancy). This means you must not block within event callbacks, |
666 | of reentrancy). This means you must not block within event callbacks, |
667 | otherwise you might suffer from crashes or worse. The only event library |
667 | otherwise you might suffer from crashes or worse. The only event library |
668 | currently known that is safe to use without C<unblock_sub> is L<EV>. |
668 | currently known that is safe to use without C<unblock_sub> is L<EV>. |
669 | |
669 | |
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670 | Coro will try to catch you when you block in the event loop |
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671 | ("FATAL:$Coro::IDLE blocked itself"), but this is just best effort and |
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672 | only works when you do not run your own event loop. |
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673 | |
670 | This function allows your callbacks to block by executing them in another |
674 | This function allows your callbacks to block by executing them in another |
671 | coro where it is safe to block. One example where blocking is handy |
675 | coro where it is safe to block. One example where blocking is handy |
672 | is when you use the L<Coro::AIO|Coro::AIO> functions to save results to |
676 | is when you use the L<Coro::AIO|Coro::AIO> functions to save results to |
673 | disk, for example. |
677 | disk, for example. |
674 | |
678 | |
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715 | unshift @unblock_queue, [$cb, @_]; |
719 | unshift @unblock_queue, [$cb, @_]; |
716 | $unblock_scheduler->ready; |
720 | $unblock_scheduler->ready; |
717 | } |
721 | } |
718 | } |
722 | } |
719 | |
723 | |
720 | =item $cb = Coro::rouse_cb |
724 | =item $cb = rouse_cb |
721 | |
725 | |
722 | Create and return a "rouse callback". That's a code reference that, |
726 | Create and return a "rouse callback". That's a code reference that, |
723 | when called, will remember a copy of its arguments and notify the owner |
727 | when called, will remember a copy of its arguments and notify the owner |
724 | coro of the callback. |
728 | coro of the callback. |
725 | |
729 | |
726 | See the next function. |
730 | See the next function. |
727 | |
731 | |
728 | =item @args = Coro::rouse_wait [$cb] |
732 | =item @args = rouse_wait [$cb] |
729 | |
733 | |
730 | Wait for the specified rouse callback (or the last one that was created in |
734 | Wait for the specified rouse callback (or the last one that was created in |
731 | this coro). |
735 | this coro). |
732 | |
736 | |
733 | As soon as the callback is invoked (or when the callback was invoked |
737 | As soon as the callback is invoked (or when the callback was invoked |
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830 | the windows process emulation enabled under unix roughly halves perl |
834 | the windows process emulation enabled under unix roughly halves perl |
831 | performance, even when not used. |
835 | performance, even when not used. |
832 | |
836 | |
833 | =item coro switching is not signal safe |
837 | =item coro switching is not signal safe |
834 | |
838 | |
835 | You must not switch to another coro from within a signal handler |
839 | You must not switch to another coro from within a signal handler (only |
836 | (only relevant with %SIG - most event libraries provide safe signals). |
840 | relevant with %SIG - most event libraries provide safe signals), I<unless> |
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841 | you are sure you are not interrupting a Coro function. |
837 | |
842 | |
838 | That means you I<MUST NOT> call any function that might "block" the |
843 | That means you I<MUST NOT> call any function that might "block" the |
839 | current coro - C<cede>, C<schedule> C<< Coro::Semaphore->down >> or |
844 | current coro - C<cede>, C<schedule> C<< Coro::Semaphore->down >> or |
840 | anything that calls those. Everything else, including calling C<ready>, |
845 | anything that calls those. Everything else, including calling C<ready>, |
841 | works. |
846 | works. |